Secondhand vape plumes could form lung damaging radicals American Chemical Society E Cigarette Secondhand Smoke Study Finds Nicotine, But Few Toxins IBTimes Secondhand Smoke vs Vape: What the Science Says Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA